For many field operations, on-site testing and short-term engineering scenarios, both fixed gas stations and cylinder gas supply have obvious limitations. Fixed equipment requires long installation cycles and cannot be moved flexibly. Cylinders involve cumbersome transportation, handling and replacement, and are restricted by site conditions, transport regulations and limited gas supply duration. To meet distributed, mobile and short-term gas requirements, lightweight and rapidly deployable gas generation equipment has attracted attention from many industries. It adopts membrane separation technology to produce gas on location and fits various working conditions outside permanent workshops.

　　The core principle of membrane separation technology lies in the different permeation rates of gas molecules through polymer membranes to separate components in air. After compressed air goes through pretreatment to remove oil, moisture and solid particles, it flows into membrane modules. Oxygen, water vapor and other components pass through membrane fibers preferentially, and the remaining enriched gas can meet application requirements. The whole unit features a relatively simple structure with few moving parts. It runs steadily and does not require complicated regeneration procedures. Qualified gas can be obtained shortly after startup. Compared with other purification methods, this technology stands out for fast startup and easy maintenance, making it suitable for scenarios with high requirements on convenience.

　　Such lightweight units serve a wide range of sectors. In pipeline on-site inspection and oil & gas field work, gas is commonly used for purging, pressure testing and on-site protection. These sites usually lack complete machine room facilities, so the equipment needs to be transported by vehicle and put into operation quickly at different work points. For emergency repair and temporary construction projects, gas demand may arise unexpectedly, and rapid deployment cuts down waiting time for gas supply. Some remote field research and sampling sites face difficulties in cylinder replenishment, and on-site gas generation eases the pressure of gas supply logistics. It also supports short-term exhibitions and temporary laboratory gas supply. Since these projects run for a limited period, permanent gas systems are unnecessary. Lightweight units can be started on demand and relocated to other sites after tasks finish.

　　During selection, decisions should be made based on comprehensive working conditions rather than equipment size alone. First, clarify continuous gas flow, peak gas demand and target gas specifications. Insufficient flow leads to inadequate supply, while excessive margin increases weight and energy consumption and hinders transportation. Second, confirm preconditions for incoming air. This type of unit normally requires clean compressed air feed, and the quality of inlet air directly affects the service life of membrane modules. Therefore, pre-filtering and drying configurations are essential. Working environments also need evaluation. Outdoor sites have wide temperature and humidity fluctuations, and some areas contain dust and rainwater. It is necessary to verify the enclosure protection rating to adapt to open-air or simple shelter conditions. Transportation factors should not be overlooked, including load capacity and space of transport vehicles, compatibility with vehicle mounting, and power supply options. For sites without mains power, supporting power solutions need to be assessed. Long-term operating costs, including consumable replacement cycles, energy consumption and membrane service life, should also be taken into account.

　　After commissioning, routine maintenance focuses on the front-end pretreatment system. Before each startup, check pipe connections and pressure status, and ensure filter assemblies are not blocked to prevent irreversible damage to membrane cores from impurities. Replace filter consumables regularly according to usage frequency to maintain stable inlet air quality. Monitor pressure and flow during operation. Shut down for inspection promptly if parameters drift and avoid continuous operation under abnormal conditions. Store the unit in dust-free and moisture-proof conditions, and protect pipelines during long-term idle periods to slow membrane aging. Operators should follow standard startup and shutdown procedures. Proper operation effectively extends equipment lifespan and ensures stable gas output.

　　Nowadays, field operation modes are becoming more flexible, and many projects do not have permanent supporting gas systems. Lightweight membrane gas generation units, with convenient deployment, easy transport and fast startup, fill the gap for temporary and mobile gas demand. Reasonable selection based on gas parameters, site environment and transport conditions, together with proper routine maintenance, delivers stable on-site gas supply for various field and temporary tasks, reduces reliance on purchased gas cylinders and improves the continuity of on-site operations.